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    体位、探头位置及方向对肝脏可视化瞬时弹性成像的影响

    Effects of body position, probe position and direction on visual transient elastography for liver stiffness mesurement

    • 摘要: 目的 探讨可视化瞬时弹性成像(ViTE)技术测量健康成人肝脏硬度的影响因素。方法 使用迈瑞Resona6 ViTE技术随机对40例健康成人进行肝硬度检测,分析不同体位、探头位置及方向对肝脏硬度测量(LSM)值的影响,并评估受试者年龄、性别、身高、体重、体质量指数(BMI)、皮下脂肪厚度对LSM值的影响。结果 仰卧位和左侧卧位右侧肋间隙LSM值分别为(4.99±1.22)kPa、(6.56±3.06)kPa,两者差异有统计学意义(P<0.05);右侧肋间隙和右侧肋弓下LSM值分别为(4.99±1.22)kPa、(4.43±1.46)kPa,两者差异有统计学意义(P<0.05);探头垂直胸壁方向、与胸壁垂直方向倾斜15°角、与胸壁垂直方向倾斜30°角时LSM值分别为(4.99±1.22)kPa、(5.20±1.53)kPa、(6.04±2.41)kPa,三者间差异有统计学意义(P<0.05);LSM值与年龄、性别、身高、体重、BMI、皮下脂肪厚度均无明显相关性;肝右叶的检测成功率显著高于肝左叶(P<0.05)。结论 应用ViTE技术检测肝脏硬度时,应考虑到患者体位、探头方向及位置对LSM值的影响。

       

      Abstract: Objective To explore the influencing factors of visual transient elastography (ViTE) for liver stiffness measurement (LSM) among healthy population. Methods The Mindray's Resona6 ViTE technique was used to randomly measure the liver stiffness of healthy adults. The impacts of body position, probe position and direction on LSM were analyzed. Furthermore, we assessed the impacts of age, sex, height, weight, BMI, and subcutaneous fat thickness on LSM. Results The LSM values from the supine and the left decubitus position were (4.99±1.22) kPa and (6.56±3.06) kPa respectively, and the difference was statistically significant. The LSM values obtained from the right intercostal space and the right inferior margin of costal arch were (4.99±1.22) kPa and (4.43±1.46) kPa respectively, and the difference was statistically significant. The LSM values obtained when the probe was perpendicular to the chest wall, at an angle of 15° to the vertical direction of the chest wall, and at an angle of 30° to the vertical direction of the chest wall were (4.99±1.22) kPa, (5.20±1.53) kPa, (6.04±2.41) kPa respectively, and the difference was also statistically significant. This study also found no significant effects of age, sex, height, weight, BMI, and subcutaneous fat thickness on LSM. Moreover, the detection success rate of the right lobe of liver was significantly higher than that of the left lobe. Conclusions During liver stiffness measurement by ViTE, it is necessary to consider the influence of subject's body position, probe direction and position on the LSM value.

       

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